ER ercd= tk_def_int(UINT dintno,T_DINT* pk_dint);

void uart3_init(void)
{USART_InitTypeDef USART_InitStructure;GPIO_InitTypeDef GPIO_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1ENR_USART3EN,ENABLE);RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE);GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOC,&GPIO_InitStructure);GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_USART3);GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_USART3);USART_InitStructure.USART_BaudRate = 115200;USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;USART_InitStructure.USART_Parity = USART_Parity_No;USART_InitStructure.USART_StopBits = USART_StopBits_1;USART_InitStructure.USART_WordLength = USART_WordLength_8b;USART_Init(USART3,&USART_InitStructure);USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);USART_Cmd(USART3,ENABLE);return;
}

void NVIC_Config(void)
{NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);  //设置中断优先级分组//使能USART3中断NVIC_IniteStructure.NVIC_IRQChannel = USART3_IRQn;NVIC_IniteStructure.NVIC_IRQChannelPreemptionPriority = 0x01;NVIC_IniteStructure.NVIC_IRQChannelSubPriority = 0x02;NVIC_IniteStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_IniteStructure);
}

#include "IntSample.h"void Usart3Handler(UINT dintno);EXPORT ER IntSample( void )
{UINT i;ER ercd;UINT intsts;T_DINT dint;DI(intsts);//屏蔽所有中断dint.intatr=TA_HLNG;dint.inthdr=Usart3Handler;//IntHandler;ercd=tk_def_int((UINT)DINTNO(USART3_IRQn),&dint);  //注册串口3中断EI(intsts);//使能所有中断while(1);
}void Usart3Handler(UINT dintno)
{B c;USART_ClearFlag(USART3,USART_FLAG_RXNE);//清除中断标志tm_putstring((UB*)"this is in usart 3 handler.\n");tk_ret_int();
}